cleanup do_install(), pep8
pep8 do_uninstall()
pep8 do_run_premove()
docstring, cleaning, for down_stat()
INFO - show name, ver, etc. for PKG

This commit is overloaded, should have been split into several. A new top-level command is introduced, 'info'. It relies on get_info() which builds a dict of useful pkg attributes. I totally forgot I already wrote this! Reporting function was pulled out of get_info() to make the command - just smarter separation of fucntions.

Another new thing is having the command itself show help-for-cmd when parameters are empty. This works, but we broke top level usage and help in process.